# File lib/rvg/misc.rb, line 102
        def glyph_metrics(glyph_orientation, glyph)
            glyph_metrics = @ctx.shadow.get_type_metrics(glyph)
            h = glyph_metrics.ascent - glyph_metrics.descent
            w = glyph_metrics.width
            if glyph_orientation == 0 || glyph_orientation == 180
                [w, h]
            else
                [h, w]
            end
        end